TWM558936U - A touch apparatus - Google Patents

Abstract

The present invention reveals a touch apparatus. The touch apparatus comprises at least a first sensing layer provided on a first transparent substrate with a plurality of first conductive wires; and a second sensing layer provided on a second transparent substrate with a plurality of a second conductive network line facing the first conductive network lines, and the direction of the first conductive wires of the first conductive lines is different from that of the second conductive lines which are perpendicular to each other. Part of the conductive wires are provided with a barrier pattern layer having different heights. The touch apparatus of the present invention may incorporate an integrated wire grid polarizer, or an integrated fingerprint identification element, to achieve a simplified structure.

Description

Touch device

The present invention relates to a touch device, which particularly relates to a touch device capable of integrating a capacitive touch element with a line polarizing element or integrating a fingerprint recognition element.

In the 1970s, people developed touch technology that can determine the position, allowing people to enter specific information by pressing the position. By alternately arranging two electric fields that are perpendicular to each other, the position of the touch can be recognized by the signal difference of the interlaced position during the touch sensing, thereby achieving the touch effect. Since then, in 1994, the International Business Machines Corporation (IBM) published a mobile phone with a touch display screen, which further promoted the development of touch-enabled display panels in various portable electronic products.

However, in the touch display screen of the prior art, the opaque electrode used in the display module or the touch panel (TP) will affect the aperture ratio of the overall transparent light to achieve the desired illumination. The power is difficult to reduce; and the wire diameter of the electrode is related to the Lithography process for semiconductor manufacturing. The smaller the wire diameter is, the higher the precision of the exposure light source and the mold, etc., so the higher the production equipment and the cost, and the higher the precision, the higher the cost step distance, for the manufacturer of the touch display screen. In terms of aperture ratio and manufacturing cost, a balance must be taken. On the other hand, the material of the opaque electrode is generally composed of a metal material, which has a considerable degree of reflectivity for natural light, especially when the wire diameter is not sufficiently small and/or is used at a large angle of view, which is easy to use. When the touch display screen is illuminated by the opaque electrode, the viewing and touch operation comfort is affected. In recent years, a metal mesh has been used for a touch structure of a large-sized touch panel because It has the advantage of being easy to produce and has received extensive attention.

However, the above technologies are in mass production, but there are many problems that need to be overcome. (1) To make the metal lines visually invisible, the metal line width may have to be less than 5um, requiring high-precision equipment; (2) in order to reach the user Accepting 98% transmittance, the sensing area is reduced by 98%, and the relative touch sensing amount may be reduced by 50 times; (3) The spacing of the metal grid is too large, and the mutual capacitance is too small to be less than the sensing signal. .

In addition, in application, if a sub-micron metal wire is used, a function of a wire grid polarizer (WGP) can be produced. Therefore, if the function of the wire grid polarizer can be achieved in the conventional capacitive touch element, the effect of simplifying the structure of the optical module sensing device can be achieved.

In addition, fingerprint identification (Fingerprint identification) has attracted a lot of application interest in the certification of security level. Capacitive fingerprint resolution requires a requirement of 550 dpi, which is a topic that traditional metal meshes need to overcome.

In view of the above problems, it is necessary to propose a capacitive touch device capable of integrating other applications to achieve a simplified structure.

In view of the shortcomings of the prior art described above, the main object of the present invention is to provide a touch device having a very narrow line width and reduced light reflectivity. By adopting the wire diameter of the sub-micron-sized conductive wire, and leaving the barrier layer to prevent reflection of natural light on the human eye, the touch device of the present invention can integrate the capacitive touch component into the linear polarizing component. Or the touch device integrating the fingerprint recognition component achieves the purpose of simplifying the structure.

For the main purpose of the present invention, the present invention provides a touch device comprising: a first sensing layer, wherein a plurality of first conductive mesh lines are disposed on a first transparent substrate; And a second sensing layer, wherein the second transparent substrate is provided with a plurality of second conductive mesh wires, the second conductive mesh wires are opposite to the first conductive mesh wires, and the first conductive wires are The network cable direction of the network cable is perpendicular to the network cable direction of the second conductive network wires; wherein a part of the conductive mesh wires is provided with a barrier pattern layer having different heights. .

According to one feature of the present invention, a layer of insulating material is further disposed between the first conductive mesh lines and the second conductive mesh lines.

According to one feature of the present invention, the line widths of the first conductive mesh lines and the line widths of the second conductive mesh lines are between 10 nm and 100 μm.

According to one feature of the present invention, the distance between the first conductive mesh lines and the second conductive mesh lines is between 1 micrometer and 1000 micrometers.

According to one feature of the present invention, the first sensing layers further comprise a third plurality of conductive mesh lines disposed between the two conductive mesh lines adjacent to the first conductive mesh lines.

According to one feature of the present invention, the second sensing layers further comprise a fourth plurality of conductive mesh lines disposed between the two conductive mesh lines adjacent to the second conductive mesh lines.

The touch device of the present invention has the following effects:

1. The conductive wire portion of the present invention has a barrier pattern layer and has a function of preventing reflection of natural light from the human eye.

2. The conductive wire of the present invention can provide a touch device with extremely narrow line width and reduced light reflectivity, and can be applied to extremely sensitive fingerprint recognition.

3. The conductive wire of the present invention can have the function of a metal wire grid polarizer to reduce the use of a polarizer.

10‧‧‧ touch device

100‧‧‧first sensing layer

110‧‧‧First transparent substrate

120‧‧‧First conductive cable

124‧‧‧Connected area

132‧‧‧Barrier pattern layer

140‧‧‧ Third conductive cable

150‧‧‧ touch chip

160‧‧‧ wire

170‧‧‧Fingerprint Identification Wafer

180‧‧‧ wire

200‧‧‧Second sensing layer

210‧‧‧Second transparent substrate

220‧‧‧Second conductive cable

224‧‧‧Connected area

232‧‧‧Barrier pattern layer

240‧‧‧4th conductive cable

To make the above and other purposes, features, and advantages of the present creation more apparent, Several preferred embodiments are described below in conjunction with the drawings and are described in detail below.

FIG. 1 shows a basic schematic diagram of a touch device of the present invention.

FIG. 2 is a schematic view showing the structure of a conductive wire of a touch device of the present invention.

FIG. 3 is a schematic diagram showing a first application embodiment of a touch device of the present invention.

4 is a schematic view showing a second embodiment of a touch device of the present invention.

While the present invention may be embodied in a variety of forms, the embodiments shown in the drawings and described herein are the preferred embodiments of the present invention. Those skilled in the art will appreciate that the devices and methods specifically described herein and illustrated in the drawings are considered as an example of the present invention, non-limiting exemplary embodiments, and the scope of the present application is only by the scope of the patent application. Defined. Features illustrated or described in connection with an exemplary embodiment may be combined with features of other embodiments. Such modifications and variations are intended to be included within the scope of this creation.

Please refer to FIG. 1 , which illustrates a basic schematic diagram of a touch device to which the present invention is applied. The touch device 10 includes at least two first sensing layers 100 and a second sensing layer 200. The first sensing layer 100 is provided with a plurality of first conductive mesh lines 120 on a first transparent substrate 110. The second sensing layer 200 is disposed on a second transparent substrate 210 and has a plurality of second conductive layers. Network cable 220. The first conductive mesh 120 and the second conductive mesh 220 face each other, and the mesh direction of the first conductive mesh 120 and the mesh direction of the second conductive mesh 220 are mutually vertical. That is, the touch device 10 is basically a capacitive touch device.

The line widths of the first conductive mesh lines 120 and the line widths of the second conductive mesh lines 220 are between 10 nm and 100 μm. The distance between the first conductive mesh lines 120 and the second conductive mesh lines 220 is between 1 micrometer and 1000 micrometers.

The touch device 10 further includes an insulating material layer 300 disposed between the first conductive mesh lines 120 and the second conductive mesh lines 220. The material of the insulating material layer 300 may be cerium oxide, cerium nitride, or cerium oxynitride. Thereby, the touch device 10 can have a better function of capacitive touch.

Please refer to FIG. 2 , which shows a schematic structural view of a conductive wire of a touch device of the present invention, that is, a schematic structural view of the first conductive mesh 120 and the second conductive mesh 220 . The second (a) diagram illustrates the first conductive mesh lines 120, and the second (b) diagram illustrates the second conductive mesh lines 220.

In the second (a) diagram, the first conductive mesh lines 120 are formed on the transparent substrate 110. A portion of the conductive mesh wires 120 is provided with a corresponding barrier pattern layer 132. The main feature is that the barrier pattern layer 132 may have different heights or may have the same height. That is, the barrier pattern layer 132 has a height difference. On the transparent substrate 110, a portion of the conductive pattern is simultaneously removed from the barrier pattern layer. Therefore, the conductive pattern completely removing the barrier pattern layer can serve as a connection region 124. The connection region 124 serves as a contact point for electrical connection of the first sensing layer 100 with other components, or a solder joint for mechanical connection.

Similarly, in the second (b) diagram, the second conductive mesh wires 220 are formed on the transparent substrate 210. A portion of the conductive mesh wires 220 is provided with a corresponding barrier pattern layer 232. The main feature is that the barrier pattern layer 232 may have different heights or may have the same height. That is, the barrier pattern layer 132 has a height difference. On the transparent substrate 210, a portion of the conductive pattern is simultaneously removed from the barrier pattern layer. Therefore, the conductive pattern completely removing the barrier pattern layer can serve as a connection region 224. The connection region 224 serves as a contact point for electrical connection of the second sensing layer 200 with other components, or a solder joint for mechanical connection.

The transparent substrate 110 and the transparent substrate 210 are selected from a soft transparent substrate and a blue One of sapphire, transparent quartz or glass. The flexible transparent substrate comprises an organic polymer, such as polyethylene terephthalate (PET), polycarbonate (Polycarbonate, PC), polymethylmethacrylate (PMMA), polyvinyl ketal Polyvinyl Butyral (PVB), Tri-cellulose Acetate (TCA), Cyclo Olefin Copolymer (COC), Polyimide (PI), and the like. The transparent substrate 110 and the transparent substrate 210 are mainly characterized in that the light transmittance in visible light can reach 80% or more.

The materials of the first conductive mesh 120 and the second conductive mesh 220 are selected from one of the group consisting of metal, metal oxide and carbon-based materials. Metals such as silver, copper, aluminum, iron, magnesium, tin, nickel, gold, cobalt, titanium, molybdenum, niobium and alloys thereof. The metal oxide is particularly a transparent conductive metal oxide such as fluorine-doped tin oxide (Sn ₂ O ₃ :F, FTO), tin-doped indium oxide (In ₂ O ₃ :Sn, ITO), doping Indium oxide of zinc (In ₂ O ₃ : Zn), boron-doped indium oxide (In ₂ O ₃ : B), hydrogen-doped indium oxide (In ₂ O ₃ : H), aluminum-doped zinc oxide ( ZnO: Al, AZO), gallium-doped zinc oxide (ZnO: Ga, GZO), boron-doped zinc oxide (ZnO: B, BZO) or one of its compositions. The carbon-based material comprises: a transparent carbon nanomaterial, such as a material obtained by combining fullerenes, carbon nanotubes and graphene. Preferably, in the present invention, the materials of the first conductive mesh 120 and the second conductive mesh 220 are one selected from the group consisting of silver, aluminum or copper.

According to the touch device 100 of the present invention, it can be applied to a Wire Grid Polarizer (WGP) or a Fingerprint Identification.

With reference to FIG. 1 and FIG. 3, a schematic diagram of a first application embodiment of a touch device of the present invention is shown. This embodiment is a schematic diagram of a touch device 100 according to the present invention applied to a metal wire grid polarizer. The first sensing layer 100 further includes a third plurality of conductive mesh lines 140 disposed between the two conductive mesh lines adjacent to the first conductive mesh lines 120. The third conductive mesh wires 140 have a line width of between 10 nanometers and 100 micrometers, and the third conductive mesh wires 140 have a distance of between 10 nanometers and 10 micrometers. The third conductive mesh wires 140 serve as metal wire grid polarizing plates. When the third conductive mesh lines 140 as gratings are smaller in size At the wavelength, after the light wave passes through such a structure, the periodic parameters and geometry of the grating will exhibit a specific birefringence characteristic to the light wave, so that the vibration component of the incident electric field perpendicular to the structure is not affected by the grating parameter, but is parallel with the structure. The electric field vibration component exhibits strong reflection characteristics due to destructive interference. The touch device 10 further includes a touch wafer 150 having a plurality of wires 160 electrically connected to the first conductive mesh wires 120 and the second conductive mesh wires 220. Since the third conductive mesh lines 140 use sub-micron metal lines, a function of one-line polarization can be generated, which can reduce the use of a layer of polarizers. In the touch with the excitation light diode, the touch device 10 of the present invention can be created or attached to the polarizer.

Please refer to FIG. 4, which shows a schematic diagram of a second embodiment of a touch device of the present invention. This embodiment is a schematic diagram of the touch device 10 according to the present invention applied to fingerprint recognition. In the present creation, when the user puts a finger on the created touch device 10, it captures a high-resolution fingerprint image of the dermis layer under the epidermis layer, and measures the ridge line and the concave shape by using the potential difference of the electric conduction. The difference between the valleys. The first sensing layer 100 further includes a third plurality of conductive mesh lines 140 disposed between the two conductive mesh lines adjacent to the first conductive mesh lines 120. The third conductive mesh wires 140 have a line width of between 10 nanometers and 100 micrometers, and the third conductive mesh wires 140 have a distance of between 10 nanometers and 10 micrometers. The second sensing layer 200 further includes a fourth plurality of conductive mesh wires 240 disposed between the two conductive mesh wires adjacent to the second conductive mesh wires 220. The line width of the fourth conductive mesh 240 is between 10 nm and 100 microns, and the distance between the fourth conductive wires 240 is between 10 nm and 10 microns. The touch device 10 further includes a touch wafer 150 having a plurality of wires 160 electrically connected to the first conductive mesh wires 120 and the second conductive mesh wires 220. In addition, the touch device 10 further includes a fingerprint identification chip 170 having a plurality of wires 180 electrically connected to the third conductive mesh wires 140 and the fourth conductive mesh wires 240.

A transparent conductive layer can be formed by proposing a micro or sub-micron metal mesh. In the low-resolution (low-density mesh) of the first conductive mesh lines 120 and the second conductive mesh wires 220, the third conductive mesh wires 140 of high resolution (high-density mesh) are placed. With these The fourth conductive mesh 240 is formed to form a capacitive fingerprint. It is important for high screen ratio and panel in-display. The fingerprint recognition reads the extremely fine features of the fingerprint and uses capacitive touch technology for analysis. The touch device 10 is applied to the authentication of the security level of fingerprint recognition, and the fingerprint recognition resolution is ~550 dpi.

In summary, the touch device of the present invention has the following effects:

1. The conductive wire portion of the present invention has a barrier pattern layer and has a function of preventing reflection of natural light from the human eye.

2. The conductive wire of the present invention can provide a touch device with extremely narrow line width and reduced light reflectivity, and can be applied to extremely sensitive fingerprint recognition.

3. The conductive wire of the present invention can have the function of a metal wire grid polarizer to reduce the use of a polarizer.

Although the present invention has been disclosed in the foregoing preferred embodiments, it is not intended to limit the present invention, and various modifications and changes can be made without departing from the spirit and scope of the invention. As explained above, all types of corrections and changes can be made without destroying the spirit of this new type. Therefore, the scope of protection of this creation is subject to the definition of the scope of the patent application attached.

Claims (10)

A touch device includes: a first sensing layer disposed on a first transparent substrate with a plurality of first conductive mesh lines; and a second sensing layer disposed on a second transparent substrate a plurality of second conductive mesh wires, the second conductive mesh wires are opposite to the first conductive mesh wires, and the mesh wires of the first conductive mesh wires and the second conductive mesh wires The directions are perpendicular to each other; wherein a part of the conductive mesh wires are provided with barrier pattern layers, and the barrier pattern layers have different heights. The touch device of claim 1 further comprising a layer of insulating material disposed between the first conductive mesh lines and the second conductive mesh lines. The touch device of claim 1, wherein a line width of the first conductive mesh lines and a line width of the second conductive mesh lines are between 10 nm and 100 μm. The touch device of claim 1, wherein the distance between the first conductive mesh lines and the second conductive mesh lines is between 1 micrometer and 1000 micrometers. The touch device of claim 1, wherein the first sensing layers further comprise a third plurality of conductive mesh lines disposed between the two conductive mesh lines adjacent to the first conductive mesh lines. The touch device of claim 5, wherein the third conductive mesh has a line width between 10 nm and 100 μm, and the third conductive mesh has a distance between 10 nm and 10 μm. between. The touch device of claim 5, wherein the second sensing layers further comprise a fourth plurality of conductive mesh lines disposed between the two conductive mesh lines adjacent to the second conductive mesh lines. The touch device of claim 7, wherein the fourth conductive mesh has a line width of between 10 nm and 100 μm, and the fourth conductive mesh lines are between 10 nm and 10 nm. micro- Between meters. The touch device of claim 1 further comprising a touch wafer having a plurality of wires electrically connected to the first conductive mesh wires and the second conductive mesh wires. The touch device of claim 8, further comprising a fingerprint identification chip having a plurality of wires electrically connected to the third conductive mesh wires and the fourth conductive mesh wires.